Objective To investigate an analytical method of GNAS gene mutations in fibrous dysplasia( FD) of the jaws and to explore the biological characteristics of bone marrow stromal cells( BMSCs) from FD patients in vitro and lay the foundation for the further study of the pathogenesis of FD. Methods The GNAS gene mutations of the 40 cases of FD who visited our hospital between2005-2016 were analyzed via extracting genomic DNA from paraffin-embedded tissues of the FD patients,allele-specific PCR amplification and...